I think so! His master, Hermit Sage, was the one who carved the words "爱" and "心" on his palms! And Gaara may have inherited the will of the Hermit Sage too!
no. He was someone who heard about the sage and admired him. The sage was born at least 300-500 years before current events(more likely 1000 years(since we heard the story about the fruit, and that seems like foreshadowing to me))
So he may be a disciple, to the remains of the sages followers, but he never knew the sage.
Damit I was gona make a thread like this with a wall of text pointless now. Yea I agree as he said my master etc and he was talking to ahuckaku. Maybe sage sealed the biju into disciples as another fail safe plus to promote friendship.
It is possible, seeing as how the Ninja guarding him had no headbands, so they could of have lived any time between SO6P's death and creation of Sand village.